Stand for supporting light projecting or light receiving units



Aug. 29, 1939. I J GELB 2,171,028

STAND FOR SUPPORTING LIGHT PBOJECTING OR LIGHT RECEIVING UNITS Filed Oct. 15, 1935 3 Sheets-Sheet l A TTORNEY.

Aug. 29, 1939. J. GELB 2,171,028

STAND FOR SUPPORTING LIGHT PROJECTING OR LIGHT RECEIVING UNITS Filed Oct. 15, 1935 Sheets-Sheet 2 INVENTOR.

ATTORNEY.

Aug. 29, 1939. J. GELB 2,171,028

STAND FOR SUPPORTING LIGHT PFOJEGIING OR LIGHT RECEIVING UNITS Filed Oct. 15, 1955 s Sheets-Sheet :5

llilllllll llllp IllllllllHLLl I r: INVENT.

ATTORNEY.

Patented Aug. 29, 1939 UNITED STATES PATENT OFFICE STAND FOR SUPPORTING LIGHT PROJECT- ING OR LIGHT RECEIVING UNITS 8 Claims.

The subject matter of this invention has to do with portable supports for adjustably and pivotally sustaining an appropriate housing having a light projecting or receiving unit. More particularly, however, the invention is particularly concerned with portable stands of the type comprising a vertical pedestal or column pivotally carrying an elongated arm for adjustably sustaining the load of the particular unit mounted at one end thereof.

The primary object of the invention is to provide a portable stand having means for rotatably sustaining an elongated support pivotally suspending a light receiving or projecting unit and slidable means rectilinearly movable relative to the rotatable sustaining means for tiltably adjusting the suspended unit.

The invention has as another object the provision of a portable stand characterized by tubular means for rotatably sustaining a hollow rod in which an elongated member is slidably and rectilinearly guided, the elongated member having a link pivoted thereto for tiltably displacing the particular unit pivotally associated with the hollow rod.

The invention has as a further object the provision of a stand comprising a pivoted connection with an arm rotatably carrying means for supporting a light projecting or receiving unit together with rectilinearly slidable means for tiltably adjusting the unit relative to its supporting arm and spring counterbalancing means for disconnectably holding the arm in a set tiltable position and for sustaining the load imparted by said light projecting or receiving unit in equilibnorm.

The invention further comprehends as an object thereof the provision of functionally and structurally improved portable stand having a tiltably supported elongated arm pivotally carrying a casing at one end and having its other end appropriately connected to a spring counterbalancing unit for holding the arm in a desired tilted position and in equilibrium.

The invention further contemplates as an object thereof the provision of a relatively rugged and durable support having a pivoted arm carrying a rotatable and settable rod comprising a yoke 50 for pivotally suspending a casing having a light projecting or receiving unit, and an elongated slidable member spaced from the rotatable rod pivotally associated with a link pivotally connected to the unit whereby upon rectilinear dis- 55 placement of the elongated member the link is angularly displaced to tilt the unit relative to the yoke.

The invention has as a further object the provision of a stand adapted to support a light receiving or projecting unit comprising means for Q5 pivotally suspending the unit, settable means for bodily and rotatably adjusting the suspending means for bodily rotating the unit, means for tilting the unit relative to its suspending means, and spring means for counterbalancing the load 10 of said unit in a tilted or nontilted position of the suspending means.

Other objects will appear from the following description taken in connection with the accompanying drawings in which: 15

Fig. 1 is a side elevational view of my stand according to the invention.

Fig. 2 is a sectional view on the line 22 of Fig. 1.

Fig. 3 is a sectional view on the line 33 of 20 Fig. 1.

Fig. 3A is a sectional view on the line 3A-3A of Fig. 1.

Fig. 4 is a View taken along the line 4-4 of Fig. 1.

Fig. 5 is an enlarged sectional view of the clamping means for removably holding an associated connecting rod of a spring counterbalancing device in a set position of adjustment.

Fig. 6 is a side elevational view, partly in sec- 30 tion of another form of stand, illustrating a housing carried thereby in a tilted position.

Fig. '7 is a fragmentary view of a portion ofthe stand illustrated in Fig. 6, showing the housing moved to a horizontal position. '35

Fig. 7A is a sectional view of a slightly modified form of lens.

Fig. 7B is a plan View of Fig. 7A.

Fig. 8 is a sectional view on the line 88 of Fig. 6.

Fig. 9 is an enlarged view of the inner rotatable tube or arm which carries the casing supporting yoke.

Fig. 10 illustrates a side elevational view of a slightly modified stand according to the invention.

Fig. 11 is an enlarged sectional View on the line H-II of Fig. 10, illustrating in dash and dot lines several settable positions of the yoke carrying rotatable tube.

Fig. 12 is a sectional View on the line l2l2 of Fig. 10 and Fig. 13 is a sectional View on the line l3l3 of Fig. 10.

Fig. 14 is a sectional and elevational View of an arc lamp according to the invention partic-" ularly illustrating a hot spot eliminator disposed adjacent the light source and Fig. 15 is a plan view of the hot spot eliminator shown in Fig. 14.

The portable stand, generally designated Hi, comprises a relatively heavy base i i appropriately supported on wheels l2. Vertically secured to base it is a post or column I3 to which is rigidly secured a yoke i l having upstanding spaced and perforated lugs l5 hingedly receiving a perforated ear 56 depending from a hollow cylindrical coupling ll fixedly secured to an elongated hollow outside cylindrical tube or shell l8 rotatably supporting an elongated hollow rod or arm I9.

Coupling I! is swingable relative to post l3 by reason of bolt 2! the shank of which serves as fulcriun means to permit coup-ling ll to hinge or pivot in respect to yoke i l. The adjustable clamping member 2i prevents transverse displacement of bolt 26 relative to yoke Id.

Fixedly secured to the forward end of the hollow settable and rotatable arm I9 is a U shaped fork or suspending means 22 having spaced arm 23 adapted to pivotally support or suspend a housing 24 which may contain an illuminating or camera unit. Secured toone end of housing 24"is a pair of spaced lugs 25 pivotally connected 'to a forward part of a link 25 having its other end pivotally secured between a pair of lugs 21 of a coupling 28 fixed to the forward end of cylindrical slidable rod 29 adapted to be reciprocably guided by the spaced hollow sleeves 39 and 3| associated with the spaced arms 32 and 33 of bracket 36 and by a sleeve 3 of the rear bracket 35. :6

Bracket 36 is provided with a guide sleeve 3'! fixedly secured to red ii); A bushing or gland 3? is appropriately non rotatably clamped to the elongated hollow rod or arm l8 secured to coupling I? and serves as a stop or end bearing'for the rotatable guide sleeve 3?. a

" Bracket35 includes an enlargement'38 pivotally straddled by a yoke 39 having its arms 40' pivotally retained on bolt 4| carried by enlargement 38. Yoke 39 has attached thereto a handle 42 which if manipulated transversely relative to'the horizontal axis of arm 83 causes inner'rod l8 torotate relative to the outside arm l8. Hence bracket 35 and arms 32 and 33 of bracket 36 will be correspondingly rotatably and angularly. displaced, consequently causing rod 29 to tilt or swingabout arm 88. Accordingly housing 24- is bodily and correspondingly tiltedin a plane transverse to the horizontal axial plane of tube l8. By reason of the close frictional gripping reaction of the reduced split collar 38 of gland 3'5, rod 59 after. having been rotatably set in a desired position is retained in such position. The desired frictional engagement between the split collar 38' and rod l9 may be controlled by adjusting'clarnping head 39' carried by bolt ii? received in ears 5! (see Fig. 3A).

Housing or casing 2'5 may be also tiltably adjusted in respect to supporting fork 22. To this end, a coupling 43 is fixedly attached to recip rocable rod 29. Secured to coupling 53 is a bolt G4 sustaining a stop pin 55 which serves as an abutment for the spaced sides 46 of a frame 46' having its lower ends connected to a yoke or bifurcation 47 having its spaced legs ii straddling a lug d9 of a manipulating handle'or lever 5E3 pivotally mounted on bolt 55 rigidly sustained by the vertical column or pedestal H3.

The legs d8 of yoke ii are hingedly connected to the perforated lug E9 of lever 5t by a suitable connecting rod 6!;

fulcrum pin 52 and the upper portion of the spaced arms of frame 416 are suitably interconnected by a brace block 53.

Loosely surrounding the shank of bolt 44 in an annulus or ring 54 which yieldingly bears against the spaced sides 46 of the frame due to the action of a helicoidal spring 55 surrounding the shank of bolt 34 and interposed between ring 54 and head 55 of the bolt.

The upper part of the lever 50 is movably guided in a track generally denoted 5! comprising spaced longitudinally disposed bars 58 appropriately carried by a coupling 59 secured to a pedestal or column l3.

By moving lever 5d, the latter pivots about the fulcrum bolt 5!, but motion longitudinally relative to rod i9 is transmitted to the yoke or knuckle ll and the spaced sides 46 of the frame and since these sides (.5 straddle bolt 44 longitudinal motion is imparted to coupling 43 and consequently rod 29 is rectilinearly displaced relative to its supporting collars or sleeves 30, 3|

against the sides of frame 45 regardless of the transverse angular position of the latter in respect to lever Eli. Therefore after handle 42 has been disposed in a desired position and frame 45 correspondingly tilted sidewise, such tilted position of the frame is retained by spring 55, thus preventing reverse rotation of rod or arm 59. Since rod 42 may be manipulated, clockwise or counter clockwise, the frame 46 may be selectively and.transversely tilted to either side of the column I? and correspondingly bodily rotate housing 24 about the horizontal axis of arm I9. In Fig. 2, the dash and dot lines indicate, for

purposes of example, one angular transversely displaced position offrame 46 after handle 62 has been rotated in a direction towards the reader or counter clockwise.

Handle d2 may be also utilized to bodily tilt outside tube or arm EB relative to pedestal 63 provided of course the rotatable retaining and control bushing 63 is manually elevated relative to connecting rod 6! which has one end swingably connected to a coupling 52 fastened to arm l8 and its other end connected by a hook 63 to a terminal 64 of a rotatable spring counter balancing unit or device 55 appropriately concealed within base ll.

More particularly, control bushing 6!] cooperates with a barrel shaped split spring or expandable metal washer 36 surrounding connecting rod ii! and supported on the cylindrical throat or seat 67 of a cylindrical casing mounted on base II. If the clamping head or bushing 60 is rotated in one direction, washer B6 frictionally bears against rod 6! preventing vertical displacement thereof. If bushing 60 be rotated in a counter direction, the frictional pressure imparted by washer 66 on rod 6| is removed and the latter may be vertically shifted and the spring counter-balancing device may be unwound or automatically coiled up depending upon the direction of the force applied either to handle 42 or the In either case, however, a downward or'upward pull be applied to either handle 42 or rod 6 I causes tube or arm I8 to be tilted relative to the main column l3 and a desired tilted position may be retained by manipulating head 60 to permit washer 66 to frictionally engage rod 6|.

Specifically, however, where an upward thrust is applied to either lever 42 or rod 6! provided the latter is released, rod I8 carries housing 24 downwardly. During this operation, however, the spring counterbalancing device unwinds or becomes extended but coacts to hold the rod or arm I8 at all times in equilibrium. After the desired adjustment has been made, head 60 is rotated to set connecting rod 6| against vertical displacement as is well understood.

With the control bushing 60 released, and a downward thrust applied to either lever 42 or rod 6|, arm I8 carries housing 24 upwardly and the spring counterbalancing device rotatably coils up or contracts although continuously balancing the load on the arm It.

By the present construction, it will be appreciated that the housing 24 may be quickly adjusted to a desired position by merely tilting the outside tubular arm I8 relative to the column, and a supplemental adjustment may be made by rotating the handle 42, which serves to rotatably set the housing about the horizontal axis of arm I 8. Housing 24 may also be adjusted relative to yoke 22 or arm I8 by merely actuating lever 5i) causing rod 29 to be rectilinearly displaced thereby effecting a change in the angular relation of the housing.

In the form according to Fig. 6, tubular arm I8 is provided with depending lug I6 pivotally supported on fulcrum pin sustained by the yoke Id of the vertical column or post l3. Within arm I8 is rotatably mounted the hollow rod or arm I9 in which is reciprocably guided the elongated solid arm or rod 29. Tubular arm I8 is provided with a reduced rear portion to which is pivotally connected the upper part of the connecting rod 6i operatively associated with the spring counterbalancing unit 65 rotatably supported within base II.

When head 60 is released, the connecting rod 6| may be raised or lowered to permit tilting of arm I8 relative to column I3 and upon tightening of the head 60 against the barrel shaped washer 66 of course, arm! 8 is retained in the desired tilted or set position.

Rigidly secured to the rotatable tubular arm I9 is the fork 22 whose spaced arms 23 pivotally sustain casing 24 which has one end pivotally secured to the arcuate link 26 having its rearward end pivotally connected to the elongated rod 23 slidably guided by the rotatable tubular arm I9. When arm 29 is shifted forwardly or rearwardly, link 26 is angularly displaced, consequently changing the annular position of housing 24 relative to the horizontal axis of tube 88 or its supporting yoke 22. Such tilting may be effected by applying a forwardly or rearwardly directed force on depending arm Ill secured to the rectilinearly slidable rod 29.

Housing 24 may also be bodily rotated to an adjusted position about the horizontal axis of rod I8. In this connection, lever 12 is utilized. This lever is swingably associated with a collar 'II rigidly secured to the rotatable tube I9. Hence if the lever 42 is rotatably displaced, tube I9 will be correspondingly displaced, consequently bodily rotating fork 22 which bodily turns casing 24.

According to the form illustrated in Figs. 10-13 inclusive non circular column I3 is slidably and vertically guided in a hollow post I3 attached to the portable base II. As illustrated hollow post I3 is provided with a reduced and split portion 12 having spaced laterally extending ears I3 adjustably and rotatably sustaining bolt 74 which if rotated upon actuating of pin I5 carried thereby, spreads or moves ears I3 towards each other to frictionally disengage collar 12 from column I3. If diverged or spread, column I3 may be slidably moved relative to the companion post I3. If ears I3 are brought towards each other, column I3 is frictionally engaged by the split collar I3 thereby preventing vertical movement of column I3 relative to post l3.

Rigidly attached to column I3 is a tube or sleeve 16 which rotatably supports the hollow arm or rod I9 in which solid rod 29 is rectilinearly guided. Yoke 22 is fixedly carried by the forward end of rod I9 and arms 23 of yoke 22 pivotally carry housing 24 to which link 26 is pivotally connected. This link is also pivotally secured to slidable rod 29 which includes a manipulatable head or button 11.

If therefore head TI is grasped and moved either forwardly or rearwardly, the angular position of link 26 is changed and accordingly housing 2 is tilted relative to the hollow tube I9 having collar "I18 fixedly secured thereto and depending from the latter is an arcuately shaped handle 19 which if grasped and rotated bodily rotates rod 59 about its longitudinal axis. Accordingly, yoke 22 is bodily rotated, thus bodily rotating housing 2 3.

Having rotated tube Hi to a desired position of adjustment, such position may be retained by actuating bolt 89 threadably carried by the spaced ears 8i depending from the split reduced portion 82 extending from sleeve-i6, that is, if bolt 89 is rotated ears 8i may be brought together to permit reduced portion 82 to firmly and friction ally grip tube it, thus preventing rotation of the latter.

With the form according to Figs. 6 and 10, it will be observed that tube l9 at its rear portion is split to define several segments 83 which frictionally cooperate and grip the exterior surface of rod 29 to hold the latter in a set position of adjustment.

In Fig. 7A, the condensing lens 98 illustrated within the housing 01' casing 24 of Fig. 7, is shown in elevation. It willbe noted that central portion 9i that part of the lens closest to the light source 92, is frosted to diffuse the intense heat rays from the light source while the remaining upper surface 93 of the lens may be left unfrostedor provided with a coating having less diffusing force than the portion Q! to transmit the less intensified heat rays.

According to the form disclosed in Fig. 14, the heat and light rays emanating from the electrical carbon members or electrodes 95 is directed onto a transparent plate 96 to dissipate the heat and light rays and remaining part of the upper surface of plate 96 may be left uncoated or provided with a coating having a lower diffusing action than the central part 9?.

In the broader aspects of the invention, I do not desire to be understood as limiting its embodiments to details herein described and shown illustratively as awide variety of modifications may be made within the scope of the appended claims without departing from the spirit of the invention.

I claim:

1. In a stand, a base, a column carried by said base, a sleeve connected to the column, an arm rotatably guided by the sleeve, a pivoted connection between said column and sleeve for tilting the arm relatively to the column, a holding member secured to one end of said arm, a housing, means for pivotally holding said housing to the holding member, an elongated slidable rod, a link interposed between said housing and rod, means for pivotally connecting one end of the link to the housing, means for pivotally connecting another end of said link to the rod, and manipulable means connected to said rod for displacing the latter in respect to said arm for changing the angular relation of the link in respect to said rod for tilting said housing relatively to said holding member.

2. In a stand, a base having an upstanding column, a tiltable bearing member pivotally connected to said column, an arm rotatably guided by said bearing member and carrying at one end thereof means for pivotally sustaining a housing, an actuating member guided by and slidable relative to said bearing member, link means pivotally connected to said actuating member and housing, a handle connected to said arm for rotating the latter about its longitudinal axis and bodily rotating said housing, a lever connected to said actuating member for shifting the latter to actuate said link means and tilt said housing relative to said arm, spring counterbalancing means within said base, and means interconnecting said arm and said counterbalancing means.

3. In a stand, a base having an upstanding column, a tiltable bearing member pivotally connected to said column, a housing, an arm rotatably guided by said tiltable bearing member and carrying at one end thereof means for pivotally sustaining the housing, an actuating member guided by and slidable relative to said bearing member, link means pivotally connected to said actuating member and housing, a handle connected to said arm for rotating the latter about its longitudinal axis and bodily rotating said housing, displaceable means connected to said actuating member for shifting the latter to actuate said link means and tilt said housing relative to said arm, spring counterbalancing means concealed by and within said base, a liftable member interconnecting said bearing member and balancing means, and clamping means associated with said liftable connection for retaining said bearing member in a set position. v

4. In a stand, a housing, an elongated arm, means for rotatably supporting the elongated arm being adapted to sustain the housing, an elongated rod, bearing means carried by said rotatable arm for slidably guiding said rod, link means pivotally connected to said rod and housing, means connected to said arm for rotating the latter and for arcuately and bodily displacing said rod, link means and housing relative to the longitudinal axis of said supporting means, and a manually operable device for shifting said slidable rod to actuate said link means and change the angular relation of said housing in respect to said arm, said manually operable device being adapted to prevent reverse arcuate displacement of said rod, link means and casing pursuant to a set position of said rotatable arm.

5. In a stand, a base, a column carried by said base, a sleeve connected to said column, an arm rotatably guided by said sleeve, a pivoted connection between said column and sleeve for tilting said arm relative to said column, a yoke secured to one end of said arm and comprising spaced extensions, a housing straddled by said extensions, means for pivotally holding said housing to said extensions, an elongated slidable rod, a link interposed between said housing and rod, means for pivotally connecting one end of said link to said housing, and means for pivotally connecting another end of said link to said rod, and manipulatable means connected to said rod for displacing the latter in respect to said arm for changing the angular relation of said link in respect to said rod for tilting said housing relative to said yoke.

6. In a stand, a base, a column secured to said base, a tiltable tubular member, a pivoted connection between said tubular member and column, an arm in part within and rotatably guided by said member and having ends overhanging said column, a yoke secured to one end of said arm, a housing pivoted to said yoke, a slidable rod, a link interposed between said rod and housing, means pivoting said rod to said link, means pivotally connecting said link and housing, and spring counterbalancing means in part concealed within said base and adapted to be extended therefrom and operatively connected to said arm to counterbalance the load of and on the latter.

'7. In a stand, a base having an upstanding column, a bearing member pivotally connected to said column, an arm rotatably guided by said bearing member, a housing, a yoke secured to said arm and having extensions straddling said housing and pivotally connected thereto, a sleeve member, means carried by said rotatable arm to sustain said sleeve member, a rod slidably guided by said sleeve member, a link having one end pivoted to said housing and another end pivoted to said rod, a lever connected to said column and to the rod to slide said rod in said sleeve for changing the angular relation of said housing in respect to said arm, and a handle connected to said arm for rotating the latter to change the angular relation of said sleeve member relative to said lever for swinging said rod to rotate said housing without changing the angular relation of said housing in respect to said rotatable arm.

8. In a stand, a base having an upstanding column, a tiltable bearing member pivotally connected to said column, a housing, an arm rotatably guided by said bearing member and carrying at one end thereof means for pivotally sustaining the housing, a sleeve device supported from said bearing member, an actuating member guided by and slidable relative to said sleeve device, link means pivotally connected to said actuating member and housing, a handle connected to said arm for rotating the latter about its longi tudinal axis and bodily rotating said housing, a lever connected 'to said actuating member for shifting the latter to actuate said link means and tilt said housing relative to said arm, and counterbalancing means for said arm.

JOSEPH GELB. 

